Orion Thin Off-Axis Guider User Manual

Orion Thin Off-Axis Guider
(TOAG)
#5531
INSTRUCTION MANUAL
Providing Exceptional Consumer Optical Products Since 1975
IN 500 Rev. B 06/14
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Orion Thin Off-Axis Guider Specifications

General

Brand	Orion
Model	Thin Off-Axis Guider
Category	Camera Accessories
Language	English

Summary

Things You Should Know Before Using the Orion TOAG

What a Thin Off-Axis Guider (TOAG) Is Used For

Explains the purpose of a TOAG in astrophotography using a pick-off prism.

Thin Off-Axis Guiders and DSLR Cameras

Discusses DSLR back-focus limitations and TOAG compatibility with modern cameras.

Thin Off-Axis Guider and Newtonian Telescopes

Highlights TOAG's importance for Newtonian telescopes with limited back-focus.

Getting Started With a DSLR

Using the TOAG

Adjusting the Prism Position

Details how to properly position the pick-off prism for optimal guiding.

Prism Tube Stabilization Setscrews

Explains the function of four setscrews for prism tube rigidity.

Center to Perimeter Adjustment

Guides on positioning the prism to avoid obstructing the main camera's light path.

Optional Side-to-Side Adjustment

Describes using thumbscrews for lateral prism adjustment.

Setting the Correct Main Camera and Autoguider Spacing

Matching the Orion TOAG to Different Imaging Trains

Basic Imaging Train Set-Up

Overview of typical imaging train components for astrophotography.

DSLR Camera and Autoguider

Explains connecting a DSLR camera and autoguider to the TOAG.

DSLR Camera with Coma Corrector

Details integrating a coma corrector with a DSLR and TOAG setup.

CCD Imaging Camera and Autoguider

Guides on adapting a CCD camera and autoguider to the TOAG.

Adjusting the Autoguider On the TOAG

How to Adjust the Autoguider Distance

Provides steps for focusing the autoguider relative to the main camera.

Debunking Off-Axis Guider Myths

How Does Autoguider Focus Affect the Guiding Performance?

Discusses the required focus sharpness for autoguider cameras.

Off-Axis Guiders Are Less Sensitive than Guidescopes?

Compares sensitivity and guide star acquisition between OAGs and guidescopes.

Finding Suitable Stars with an Off-Axis Guider Is Difficult!

Addresses challenges in finding guide stars and the benefits of OAGs.

Care and Storage